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Talja [164]
3 years ago
10

1/3x^2-5=7 what is x

Mathematics
1 answer:
Mnenie [13.5K]3 years ago
3 0

Answer:

x= 6

Step-by-step explanation:

\frac{1}{3}x^{2}-5=7\\

Add 5 to both sides

\frac{1}{3}x^{2}-5+5=7+5\\\\\frac{1}{3}x^{2}=12\\

Multiply both sides by 3

3*\frac{1}{3}x^{2}=12*3\\\\x^{2}=36\\

x² = 6*6

Take square root,

√x² =√6*6

x = 6

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